Sierra Classic 1500 2WD V8-5.3L Hybrid (2007)
Fuel Rail: Service and Repair
Fuel Injection Fuel Rail Assembly Replacement 2
FUEL INJECTION FUEL RAIL ASSEMBLY REPLACEMENT (5.3L (L59) ENGINE)
REMOVAL PROCEDURE
IMPORTANT:
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The L59 E85 fuel rail is comprised of a material that is compatible with fuel that has a concentration of up to 85 percent ethanol. The
E85 fuel rail also uses an E85 Denso fuel injectors. Because of this, special procedures will be used in servicing the fuel rail and
associated components. The screws that fasten the retaining clips for the crossover pipe to the fuel rails are thread cutting and
therefore should NOT be removed from the fuel rail. The fuel rail will be serviced as an entire component.
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An 8-digit identification number (1) is located on the fuel rail. Refer to this model identification number if service or part replacement
is required.
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027) Fuel Pressure Relief (Without CH 48027).
2. Remove the wire harness bracket nut (2).
3. Disconnect the evaporative emission (EVAP) purge solenoid electrical connector (1).
4. Disconnect the generator electrical connector (3).
5. Disconnect the following electrical connectors:
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Manifold absolute pressure (MAP) sensor (1)
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Knock sensor (2)
